I don't want to let him down, but with the sales reports due for next week and the trade show to prepare for, it's a bit much for me to take on at the moment.
がっかりさせたくはないんだけど、私も来週提出の売上報告書があるし、準備しなくちゃいけない展示会もあるし、今それを引き受ける暇ないのよ。